"We have to watch for a lingering rain or thunderstorm that could further delay the race," said Reppert. "A shift can not be ruled out."

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If there's a delay, the weather hit the Monster Energy NASCAR Cup Series for the second consecutive week.

Last Sunday, the race on Chicagoland Speedway was stopped by heavy thunderstorms.

"Nevertheless, according to Reppert, Daytona usually has thunderstorms for the summer race, and the tropical humidity makes Saturday more active than usual.

The thunderstorms have lowered temperatures from the high of the day to about 22 ° C ° C when the race starts early Saturday night and is expected to fall into the mid-70s AccuWeather RealFeel® The temperature is between the mid and high 80s.

Download the free AccuWeather app to find out When thunderstorms threaten your community with AccuWeather MinuteCast®, visit AccuWeather.com and stay up to date with the AccuWeather network from DirecTV, Frontier, and Verizon Fios.